Center Hole Punch Adapter for Calendar Making

This is a center hole punch adapter designed for creating the classic wall-hook hole in wall calendars.

Instead of buying an expensive dedicated calendar punch (which can cost a lot), this adapter allows you to use an affordable standard heavy-duty punch and convert it into a precise center punch solution.

It is specifically designed for this puncher model:

https://www.amazon.de/dp/B082JFPGFG?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

•  ✅ Features
  

  • Precise centered hole for wall calendar hanging

  • Adjustable positioning using sliding ruler

  • Clean and repeatable results

  • Much cheaper alternative to professional calendar punch machines

  • No permanent modification of the puncher required

• 📏 Supported Formats
  
  

  • Supports up to A3 format

  • A4 and A3 positions are marked directly on the adapter

  • The full version requires a build plate of at least 300 × 300 mm.

  • If you only need A4 format, you can cut off the A3 extension part of the model in slicer and print it on a smaller build plate.

• 🔩 Hardware Required
  

  • 2x M3 screws(Length depends on your print tolerance – typically 12–16 mm works well)

  • No other hardware required.

• 🛠 How It Works

The adapter aligns the puncher to the exact center of your paper stack and ensures consistent positioning every time.

• Insert the punch into the adapter

• Secure it with 2x M3 screws

• Align your paper stack (A4/A3)

• Punch

• Repeat with perfect consistency

Perfect for:

• Wall calendars

• DIY planners

• Custom notebooks

• Small print shop production

• 🖨 Printing Recommendations
  

  • Material: PLA or PETG (PETG recommended for durability)

  • Infill: 15–30%

  • 3–4 perimeters for strength

  • Print flat on the build plate

  • No supports required

• 💡 Why I Made This
  

  • Dedicated calendar hole punchers are very expensive.

  • This adapter makes it possible to create professional-looking wall calendars at a fraction of the cost — perfect for makers and small businesses.